Here's some more choices that might pique your interest!

-Genjitsu no Yohane: Sunshine in the Mirror AU:
A fantasy spinoff of Love Live! Sunshine!! starring Yoshiko... err, Yohane. It'll be getting an anime in 2023!

-School Idol Size Festival AU:
All the idols... from every Love Live series... attending one school! That's 40+ idols to play around with!

 

-Link! Like! Love Live!